title: High efficiency and high peak power picosecond mid-infrared optical parametric amplifier based on BaGa4Se7 crystal.
abstract: A high efficiency and high peak power picosecond (ps) mid-infrared optical parametric amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
authors.forename: Feng
authors.initials: F
authors.lastname: Yang
authors.forename: Ji-yong
authors.initials: JY
authors.lastname: Yao
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Xu
authors.forename: Kai
authors.initials: K
authors.lastname: Feng
authors.forename: Wen-long
authors.initials: WL
authors.lastname: Yin
authors.forename: Fang-qin
authors.initials: FQ
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.forename: Shi-feng
authors.initials: SF
authors.lastname: Du
authors.forename: Qin-jun
authors.initials: QJ
authors.lastname: Peng
authors.forename: Jing-yuan
authors.initials: JY
authors.lastname: Zhang
authors.forename: Da-fu
authors.initials: DF
authors.lastname: Cui
authors.forename: Yi-cheng
authors.initials: YC
authors.lastname: Wu
authors.forename: Chuang-tian
authors.initials: CT
authors.lastname: Chen
authors.forename: Zu-yan
authors.initials: ZY
authors.lastname: Xu